Phase equilibria in the NaF-LiF-LaF3 system

Savchuk, R. N.; Faidyuk, N. V.; Омельчук, А. А.; Луцык, В. И.; Zelenaya, A. É.

doi:10.1134/s0036023614060175

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…This is due to the complex structure of the multicomponent system in its molten state, as in its solid state. In the alkali fluorides melts, the NdF 3 was found to exist in the form of complex ions NdF [23]. The MF-NdF 3 binary systems contain phases of various compositions, the relevant data on which are very different [25,27].…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the NdF 6 3− decomposes readily with increasing temperature. If LiF does not form compounds with NdF 3 , then NaF and KF can form intermediate compounds of the compositions (M = Na, K) MNdF 4 , M 2 NdF 5 , M 3 NdF 6 , MNd 2 F 7 , MNd 3 F 10 [ 23 ]. The MF-NdF 3 binary systems contain phases of various compositions, the relevant data on which are very different [ 25 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…Usually, binary or ternary systems of alkali and REM fluorides have been studied [ 20 , 21 , 22 , 23 , 24 ]. Thus, Berkani and Gaune-Escard [ 20 ] performed experiments on the modeling and thermodynamic computation of the binaries NdF 3 -MF (M = Li, Na, K).…”

Section: Introductionmentioning

confidence: 99%

“…The (LiF-NaF) eut -LaF 3 phase diagram below the liquidus line is quite complex: several crystallizing compounds can be identified. The authors [ 23 ] found that in the LiF-NaF-LaF 3 system there are two ternary invariant points, eutectic and peritectic. Experimental investigation using TA and thermodynamic modeling of the LiF-NdF 3 -DyF 3 was accomplished by Abbasalizadeh et al [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Quasi-Binary Phase Diagram FLiNaK-NdF3

et al. 2021

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The NdF3 solubility in molten eutectic FLiNaK, which is a conceivable medium for a molten salt reactor (MSR), was determined by the quasi-binary phase diagram FLiNaK-NdF3. The eutectic mixture FLiNaK was prepared by direct melting of components LiF, NaF and KF·HF. The acidic anhydrous salt (KF·HF) was used instead of the hygroscopic KF. The NdF3 was sintered by hydrofluorination of Nd2O3. The oxygen impurity in the prepared eutectic FLiNaK, determined by an oxygen analyzer LECO OH836, was 0.036 wt.%, whereas the NdF3 contained 0.04 wt.% of oxygen. A part of the FLiNaK-NdF3 quasi-binary phase diagram was obtained using two thermal analysis techniques: differential thermal analysis (DTA) and differential scanning calorimetry (DSC). The FLiNaK-NdF3 phase diagram in the region of 0–30 mol.% NdF3 contains one eutectic at 2 mol.% NdF3 and 450 °C and two peritectic points: 8 mol.% NdF3 at 500 °C and 22 mol.% NdF3 at 575 °C. The region of the FLiNaK-NdF3 phase diagram below the liquidus line is rather complicated due to the complex structure of the multicomponent system in its molten state, as in its solid state. The NdF3 solubility in FLiNaK is about 5 mol.% at 490 °C and 29 mol.% at 700 °C; this means that the process of the MA transmutation in the MSR can be carried out in molten FLiNaK with a content of actinides as high as 15–20 mol.% in the temperature range of 550–650 °C.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the Quasi-Binary Phase Diagram FLiNaK-NdF3

et al. 2021

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Physicochemical Investigation of the Ternary (LiF + MgF₂)_eut + LaF₃ Molten System

Kubíková

Mlynáriková

et al. 2020

J. Chem. Eng. Data

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The physicochemical properties of the (LiF (1) + MgF 2 (2)) eut + LaF 3 (3) molten system have been investigated. The phase equilibria, density and volume properties, electrical conductivity, and surface tension have been selected for investigation. The phase equilibria have been measured by thermal analysis method, and the CALPHAD method for optimizing of the phase diagram has been used in order to interpret the obtained experimental data. Calculated values of the eutectic point of the binary system (LiF (1) + MgF 2 (2)) eut have the following coordinates: eutectic temperature T eut = 998 K and x 2 = 0.3095 and calculated composition of the ternary eutectic, according to the thermodynamic model, are at x 1 = 0.6627, x 2 = 0.2718, and x 3 = 0.0655. The Archimedean method of hydrostatic weighing was used for density measurements, a method based on the principle of phase shift measurement was used for electrical conductivity measurements, and the maximum bubble pressure method was used for surface tension measurements. The calculated concentration dependencies of particular physicochemical properties showed increasing character for density, partial molar volume, and electrical conductivity, while decreasing character was observed for surface tension. These data have been compared with corresponding physicochemical properties of two other molten systems: (LiF + CaF 2 ) eut + LaF 3 and (LiF + NaF) eut + LaF 3 .

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Spatial Computer Model of the UCl3–NaCl–MgCl2–PuCl3 Isobaric Phase Diagram

Vorob’eva,

Zelenaya,

Lutsyk

et al. 2023

Russ. J. Inorg. Chem.

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Phase equilibria in the NaF-LiF-LaF3 system

Cited by 3 publications

References 6 publications

Investigation of the Quasi-Binary Phase Diagram FLiNaK-NdF3

Investigation of the Quasi-Binary Phase Diagram FLiNaK-NdF3

Physicochemical Investigation of the Ternary (LiF + MgF₂)_eut + LaF₃ Molten System

Spatial Computer Model of the UCl3–NaCl–MgCl2–PuCl3 Isobaric Phase Diagram

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Phase equilibria in the NaF-LiF-LaF3 system

Cited by 3 publications

References 6 publications

Investigation of the Quasi-Binary Phase Diagram FLiNaK-NdF3

Investigation of the Quasi-Binary Phase Diagram FLiNaK-NdF3

Physicochemical Investigation of the Ternary (LiF + MgF2)eut + LaF3 Molten System

Spatial Computer Model of the UCl3–NaCl–MgCl2–PuCl3 Isobaric Phase Diagram

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Physicochemical Investigation of the Ternary (LiF + MgF₂)_eut + LaF₃ Molten System